The annual factor will be found by dividing any year's population by the population of the year before. The points most easily read from the graph are the populations for years 0 and 1. Then the annual factor is ...
If width is equal to length then it's a square. perimeter in this case would be 4x length of each side. that is( 4 x length)= 210.5 length= width= 210.5/4= 52.62 feet